Organic light emitting diode and organic light emitting device having the same
US11424424B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2019 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Nov 2, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/40
Abstract
The present disclosure relates to an organic light emitting diode including an emitting material layer that has a host and two different delayed fluorescent materials whose energy levels are controlled and an organic light emitting device including the diode. Exciton energy is transferred from a first delayed fluorescent dopant to a second delayed fluorescent dopant, which has singlet and triplet energy levels lower than singlet and triplet energy levels of the first delayed fluorescent dopant and a narrow FWHM (full-width at half maximum) compared to the first delayed fluorescent dopant so that efficient light emission can be realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.